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Carlos Alcaraz embraces coaches after winning US Open (1:45)

Carlos Alcaraz won the US Open in a four-set match. There is a delay of1:45.

9:10 PM ET

It would take "head, heart and courage" to be the best tennis player in the world according to Carlos Alcaraz Lerma.

In the course of the US Open men's singles final on Sunday, Carlos Alcaraz had to draw on those three in order to win.

This victory will make Alcaraz the first teenager to reach the top of the rankings.

He's going to leave a mark on this sport when he's done.

"This is something I've dreamed of since I was a kid -- to be number one in the world, and champion of a Grand Slam is something I've worked really hard for," he said after the match.

At the end of the second set, Alcaraz looked flat. There were three five-set matches leading up to this match.

At the end of the third set, it appeared that the balance would be in the Norwegian's favor. Just like he's done repeatedly here, Alcaraz found another level, winning a remarkable point to take the set to a tiebreak, and then blowing him away in the next game.

Alcaraz harnessed the crowd's energy to get him over the line in the fourth. The heavy legs were light again, and Alcaraz was making heavenly shots.

On Monday, Alcaraz will become the youngest world No. 1 on the men's side since the rankings began. Robert Deutsch-USA TODAY Sports

The unbelievable look can be made to look almost normal. There is an eye-catching superstar who has the potential to be a mainstay in Grand Slam finals for the next 15 years.

He hit a forehand winner down the line to take it to a first-set tiebreak and then he hit a behind-the-back shot against Jannik Sinner to take it to a first set. It's special.

The Spaniard was the overwhelming favorite. He fulfilled the hype.

That doesn't take away from the fact that the man threw everything at the man. He will be in a grand slam. After losing to Nadal in the final of the French Grand Prix, Ruud was much more settled against Alcarz. Despite his play, Alcaraz had more.

At the key match turning moments, Alcaraz was in front. We've seen Alcaraz stretch for returns so many times that they just dropped in. Today, he couldn't rely on those moments of tennis fortune. To win this, Alcaraz had to win the arm-wrestle.

The victory came on the heels of a marathon week. He spent more time on the court than any other player in the tournament. He had to defeat Marin Cilic and Sinner in order to get to the final. The semifinal win by Alcaraz lasted 4 hours and 19 minutes.

He had already been there three times this week if the match went five. He was asked if he was exhausted.

He said a small amount. You can't be tired in the final run of a Grand Slam, you have to keep going. I have worked hard for it.

Alcaraz spent a total of 23 hours, 40 minutes on court this fortnight -- the most by any men's player during any one major tournament since the start of 2000. EPA/JASON SZENES

He didn't look rattled despite his sleep pattern being terrible. There were a few times when he was focused on the court.

The team around him is also part of the reason for that. As Alcaraz was serving for the title, he went 30 unanswered points. The people in his box were getting excited. Juan Carlos' gesture was for them to calm down. It wasn't certain until it was done.

Alcaraz was on the floor crying after winning the title. He got up and greeted his team.

Alcaraz said that all of the top decisions are with his family. The tears flowed again as he sat back down after climbing back down. He said that he was thinking of his mother and grandfather.

His competitors should be concerned by this win. The first of 14 singles titles went to him when he was the youngest winner since Pete Sampras. Alcaraz has the ability to do things like that.

We were concerned about what the future of men's tennis would look like after Roger, Nadal, and Novak were gone. It's time to worry no longer. It is built on head, heart and courage.